Difference between pinacoderm and choanoderm

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

Let me share with you a difference between pinacoderm and choanoderm.

Aspect Pinacoderm Choanoderm
Present in Found in the outer layer of the sponge body Found in the inner layer of the sponge body
Cell types Flattened epithelial cells (pinacocytes) Collar cells or choanocytes
Function Protective layer, involved in maintaining the shape of the sponge Choanoderm is involved in water filtration and feeding processes
Structure Single layer of pinacocytes Inner layer composed of choanocytes
Movement of water Does not participate in water movement Generates water currents through the movement of flagella on choanocytes
Role in feeding mechanism Not involved in feeding processes Actively involved in filter-feeding, capturing food particles from water
Cellular structure Cells are flattened and form a protective barrier Cells have a collar-like structure with a flagellum, creating water currents
Function in sponges Protective and structural role Essential for the sponge’s feeding and nutrient acquisition
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